Cox Radio Control Cub Trainer

Hello Mauricio,
Thanks for the warm welcome. I appreciate it.
I’m please you liked the post.
I’ll post more as I progress in the project.
Best wishes!

to the forum, @davehour !

You can do a lot with rudder only. I flew that quite extensively in the 1970's and early 1980's.

https://www.airplanesandrockets.com/resources/you-can-stunt-your-rudder-plane-jul-1957-aircraft-modeler.htm

Our flying bud, Tony, has a Cub that has been outfitted with rudder, elevator, and throttle.  This footage is from his flights at the S.M.A.L.L. Fly-In (near Little Rock, Arkansas) a few years ago.

Really a sweet-flying little plane, especially on a calm evening!

Good luck with your Cub!!!!


https://www.youtube.com/watch?v=U1AQwk6tISI

Hello david very nice find I thought I noticed that the elevator seems to have a hinge ? I've never seen one but I think it's possible to convert for two channels and kim has already seen one that would surely make a very good model with two or 3 channels And make the plane easier to steer and drive too The use of a new control would be good because nowadays it is very light, small and powerful with a much larger range. Also its posible To use smaler lipo batry that provide mutch more power I too will be tempted to use it for a while sometimes with the original components but would surely end up with several modifications That's what I did with my ez bee And this plane is much better now I must say I would never go back to the original two channel

Hi guys,

I appreciate all that valuable information!

I range tested the model and it passed. I did it in a congested urban area and was impressed it wasn’t affected by nowadays signals.

The model and Tx use alkaline AA’s.

The elevator does have a hinge to make adjustments depending on how the model behaves in flight.

I’ll probably add the model to my Cox collection after some flights, or may fly it occasionally.

Hello guys,

I cleaned the Pee Wee engine. The engine has never been fired, but the piston/rod joint has 0.012”(0.3mm) of play. Can I run the engine or must reset the piston/rod joint?

Thanks.

That seems to be a good amount of play. These smaller engine rev to very high RPM's, the more the play the more the hammering effect because of it.

I always reset the socket joint after every season of flight. When I was doing it, could easily put in about 100 or more flights from late Spring to early Fall. Resetting gave me a good start for the next season.

Since I gather that the engine you have has some time on it, personally, I would reset it. Otherwise, it could possibly fail. Back in the old days, these engines were fairly inexpensive and parts were available, so they were easily maintainable. But now, parts are harder to come by.

It is up to you, but if you do decide to run without reset, I wouldn't be trying to press the engine into extremely high RPM's, i.e., no extra high nitro fuel.

Hi guys,

I finished fixing and restoring the Cox Cub Trainer and it’s ready to fly!
Following a recap of the work done:

-Decals removed, repositioned and their edge sealed with epoxy to prevent peel off.
-Foam filler applied to the fuselage and wing on areas with noticiable slits and marks.
-Fixed the broken rudder horn, and vertical fin glued to the fuselage.
-Main gear re-glued to the fuselage because it was loose.
-Tie wraps ends installed and epoxied to the main gear ends because ends were broken and tires were not hold properly.
-Tail skid added to the fuselage.
-Horizontal stabilizer straightened, glued to the fuselage and reinforced at the center because it was weak due to the creases produced when it was not fixed to the fuselage.
-Wing rubber bands factory protector tape installed.
-CA applied to the dowels to prevent fuel oil soaking.
-CA applied to the engine firewall screws to prevent them from loosening due to the vibrations.
-Rx antenna cleaned, Rx switch and integrated servo pot, Tx switch and pot, cleaned and lubed. Of particular interest, the Cox/Sanwa integrated servo motor uses cooper brushes.
-Engine broken in.

More pictures:

Pictures:

Pictures:

Video of radio system working:

Kim wrote:Hey Dave,
Thought you might get a kick out of Tony's Cub, flying at the 2019 S.M.A.L.L. Fly-In, near Little Rock!

Thank you very much Kim!

This was my first R/C airplane, my grandmother bought it for me on a trip to San Antonio in 1978, I was 12 years old.

Living in Mexico City at an altitude of 7,200 it did not fly, I changed the engine to a BW 049 and the torque was to much and the plane spiraled to the left.

After the not very successful flights, my father bought me Jetco Cessna 170 kit, I installed the radio that came with the cub and the BW 049 and I was able to fly it at my grandparents garden, it was my first flight and you can imagine what happened when I tried to land it.

I was also fortunate to find one in Ebay and now is an important part of my collection.

Looking to the past, I hope that instead of the Cessna 170  I should have gotten a Wanderer glider, it would have been a lot of fun with the single channel Cox radio, in fact I am trying to find such radio, I do not want to alter my Cub, and install it on a glider like the Wanderer or Gentle Lady.